Silico-molybdenum steel and article made therefrom



OUI' Steel mak' for Here s can also be Ver. lng rolls A. it l taken. Thesignicant thing 2% of this element. -Hence,

the expression 1n the claims should not be restrictively to consider isthe effect produced. What applies to the expression concerning silicon,obviously also v applies to that concerning molybdenum.

'- molybdenum and amounts contribute great strengthv and hardtialamounts less than 2%.

By the expression normal temperatures it is intended to cover those ofthe atmosphere under ordinary circumstances.

While several examples of compositions made in accordance with ourinvention have been given, and also various applications thereof,obviously it is not intended to limit such illustrations. We conr theinvention by sider that our invention broadly .is the application of ourdiscovery that silicon and molybdenum contribute high mechanicalproperties, such as high tensile strength and yield point, and hardnessat ordinary and also at elevated temperatures. invention is theapplication of the idea that silicon ness through a wide range of Havingthus described our We claim as new ters Patent'is:

1. An article adapted .to 'be used at both normal and elevatedtemperatures, and to be subjected to great stresses, made of a steelcomprising'carbon from .10% to 1.25%, silicon approximately 2%,molybdenum approximately .50% and chromium in substantemperatures.invention what and desire-to secure by Let- 2. A mill roll made of asilicon approximately 2%, mlybdenum approximately .50% and chromium inexcess of .50% but not substantially exceeding 2.00%.

.3, A mill roll made of a steel comprising silicon approximately 2%,molybdenum approximately .50%, carbon greater than .65% and chromium inexcess of .50% but not substantially exceeding 2.00%.

In testimony whereof I hereunto aiix my signature. v

FRED C. T. DANIELS.

In testimony whereof `I hereunto aix my signature.

WnLiAM ROBERT sHIMER.

Briefiy, our

in moderate steel comprising I

